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Answer: BE Explanation: “- a bridge is a two interfaces device that creates 2 collision domains, since it forwards the traffic it receives from one interface only to the interface where the destination layer 2 device (based on his mac address) is connected to. A bridge is considered as an “intelligent hub” since it reads the destination mac address in order to forward the traffic only to the interface where it is connected” https://learningnetwork.cisco.com/thread/1734

QUESTION 2 What are three reasons that switches supersede bridges? (Choose three.)

QUESTION 3 What action does a switch take if the destination MAC address is unknown?

A. discard frame B. send ICMP unreachable message to source C. flood packet on all ports D. compare destination IP address against an ACL to determine if it is permitted E. send gratuitous ARP on all ports and wait for reply before forwarding

Answer: C Explanation: “What happens though when the switch receives a frame with a destination MAC address that is not included in the table? In that case the switch will just broadcast/flood the frame with the unknown destination address to all of its ports (apart from the port where the frame came from). This process is called unknown unicast flooding. ” http://telconotes.wordpress.com/2013/03/09/how-a-switch-works/

QUESTION 4 Which statement describes the purpose of the MAC address forwarding table of a switch?

A. The switch consults the forwarding table to determine the best route to a destination. B. The switch consults the forwarding table to determine the output port. C. The switch consults the forwarding table to determine if the packet is routable. D. The switch consults the forwarding table to determine if access control permits the packet.

Answer: B

QUESTION 5 What are two attributes of a VLAN? (Choose two.)

A. A VLAN defines a collision domain. B. A VLAN defines a broadcast domain. C. Broadcasts are flooded to all VLANs. D. Collisions are flooded to all VLANs. E. A Layer 3 device is required to route packets between VLANs. F. A Layer 2 device is required to route packets between VLANs.

Answer: BE Explanation: “In computer networking, a single layer-2 network may be partitioned to create multiple distinct broadcast domains, which are mutually isolated so that packets can only pass between them via one or more routers; such a domain is referred to as a virtual local area network, virtual LAN or VLAN.” “A router (Layer 3 device) serves as the backbone for network traffic going across different VLANs.” http://en.wikipedia.org/wiki/Virtual_LAN

A. They are globally routable. B. They are not globally routable. C. They must not be filtered at Internet border interfaces. D. They should be filtered at Internet border interfaces. E. They include 10.0.0.0/8, 172.16.0.0/16, and 192.168.1.0/24. F. They include 10.0.0.0/8, 172.16.0.0/21, and 192.168.0.0/16.

QUESTION 10 Which two statements describe the purpose of RFC 1918? (Choose two.)

A. Establish a range of IP addresses that are dedicated to the growing use of multicast video. B. Establish a range of IP addresses that are dedicated to the growing use of peer-to-peer file-sharing applications. C. Establish a range of IP addresses that are dedicated to use on internal networks. D. Establish a range of IP addresses to address the shrinking pool of globally routable addresses. E. Delay the transition to IPv6.

QUESTION 11 What are three reasons to migrate from IPv4 to IPv6? (Choose three.)

A. IPv6 eliminates the requirement for NAT. B. IPv6 includes enough IP addresses to allocate more than four billion IP addresses to every person on earth. C. IPv6 eliminates the need for VLANs. D. Hosts can be assigned an IP address without DHCP. E. Hosts can be assigned an IP address without DNS.

Answer: ABD Explanation: “IPv6 address contains 32 characters vs. 12 in IPv4. This will grant no ip address translation and dynamic changes. We will even don’t need NAT! ” http://www.ipv6.ru/english/history/goipv6.php” IPv6 uses a 128-bit address, allowing 2128, or approximately 3.4?038 addresses, or more than 7.9?028 times as many as IPv4, which uses 32-bit addresse”; http://en.wikipedia.org/wiki/IPv6

QUESTION 12 Which two options describe services that are provided by TCP? (Choose two.)

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